lugia19/Claude-WebExtension-Launcher ? reverse-engineered prompt

Build me a desktop installer for Claude that makes a separate extended version of the app, so I can keep the official Claude Desktop installed too.

I want it to download the latest Claude Desktop, set up its own standalone copy, and make it easy to add and run web extensions from a local extensions folder. It should also come with a couple of built in extensions already installed, and keep both the app and extensions updated automatically.

Please make it work on Windows and Mac, and let me launch extra Claude windows with a name like --instance work so I can use multiple accounts or have separate sessions open. If something goes wrong, I want a debug mode that shows useful logs.

It should feel like a normal installer, with a custom icon so it is easy to tell apart from the regular Claude app. If you need to check current docs or platform details, look them up online.